Mrkos is a comet in the Comet orbit class. Its orbit takes it from 1.25 AU to 223,208.61 AU from the Sun; one orbit takes 37,284,926.3 years. Orbit from the JPL solution of 15 April 2021.
Where is it now
- Distance from Sun
- 91.441 AU
- True anomaly
- 166.56°
- Distance from Earth
- 90.739 AU
- As of
- 25 October 2026
Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.
In the sky
- Right ascension
- 23h 55m 33s
- Declination
- -20° 56′ 15″
- Constellation
- Aquarius
- Distance from Earth
- 90.75 AU
- Elongation from the Sun
- 134.09° — well clear of the Sun
Favours the southern hemisphere; low or below the horizon from far north.
From your location
See how high it is right now, whether it is up after civil twilight, and when it rises and sets where you are.
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Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.
Orbital elements
- Semi-major axis
- 111,604.933 AU
- Eccentricity
- 1
- Inclination
- 19.64°
- Orbital period
- 37,284,926.3 years
- Perihelion
- 1.253 AU
- Aphelion
- 223,208.613 AU
- Longitude of ascending node
- 100.62°
- Argument of periapsis
- 84.69°
- Epoch · J2000
- 2437072.5
- Orbit class · COM
- Comet
- Earth MOID · 177.4 LD
- 0.4558 AU
- Tisserand (Jupiter)
- 1.307
Orbit quality
- Observations used
- 19
- Data arc
- 297 days
- First observed
- 4 December 1959
- Last observed
- 26 September 1960
- Residual RMS
- 0.2 ″
- Solution · Otto Matic
- 15 April 2021
Discovery & classification
Also known as 1959 X1
Sources
- visual properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB